tests versuch 2

venv/lib/python3.11/site-packages/coverage/data.py

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+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
+
+"""Coverage data for coverage.py.
+
+This file had the 4.x JSON data support, which is now gone.  This file still
+has storage-agnostic helpers, and is kept to avoid changing too many imports.
+CoverageData is now defined in sqldata.py, and imported here to keep the
+imports working.
+
+"""
+
+from __future__ import annotations
+
+import glob
+import hashlib
+import os.path
+
+from typing import Callable, Dict, Iterable, List, Optional
+
+from coverage.exceptions import CoverageException, NoDataError
+from coverage.files import PathAliases
+from coverage.misc import Hasher, file_be_gone, human_sorted, plural
+from coverage.sqldata import CoverageData
+
+
+def line_counts(data: CoverageData, fullpath: bool = False) -> Dict[str, int]:
+    """Return a dict summarizing the line coverage data.
+
+    Keys are based on the file names, and values are the number of executed
+    lines.  If `fullpath` is true, then the keys are the full pathnames of
+    the files, otherwise they are the basenames of the files.
+
+    Returns a dict mapping file names to counts of lines.
+
+    """
+    summ = {}
+    filename_fn: Callable[[str], str]
+    if fullpath:
+        # pylint: disable=unnecessary-lambda-assignment
+        filename_fn = lambda f: f
+    else:
+        filename_fn = os.path.basename
+    for filename in data.measured_files():
+        lines = data.lines(filename)
+        assert lines is not None
+        summ[filename_fn(filename)] = len(lines)
+    return summ
+
+
+def add_data_to_hash(data: CoverageData, filename: str, hasher: Hasher) -> None:
+    """Contribute `filename`'s data to the `hasher`.
+
+    `hasher` is a `coverage.misc.Hasher` instance to be updated with
+    the file's data.  It should only get the results data, not the run
+    data.
+
+    """
+    if data.has_arcs():
+        hasher.update(sorted(data.arcs(filename) or []))
+    else:
+        hasher.update(sorted_lines(data, filename))
+    hasher.update(data.file_tracer(filename))
+
+
+def combinable_files(data_file: str, data_paths: Optional[Iterable[str]] = None) -> List[str]:
+    """Make a list of data files to be combined.
+
+    `data_file` is a path to a data file.  `data_paths` is a list of files or
+    directories of files.
+
+    Returns a list of absolute file paths.
+    """
+    data_dir, local = os.path.split(os.path.abspath(data_file))
+
+    data_paths = data_paths or [data_dir]
+    files_to_combine = []
+    for p in data_paths:
+        if os.path.isfile(p):
+            files_to_combine.append(os.path.abspath(p))
+        elif os.path.isdir(p):
+            pattern = glob.escape(os.path.join(os.path.abspath(p), local)) +".*"
+            files_to_combine.extend(glob.glob(pattern))
+        else:
+            raise NoDataError(f"Couldn't combine from non-existent path '{p}'")
+    return files_to_combine
+
+
+def combine_parallel_data(
+    data: CoverageData,
+    aliases: Optional[PathAliases] = None,
+    data_paths: Optional[Iterable[str]] = None,
+    strict: bool = False,
+    keep: bool = False,
+    message: Optional[Callable[[str], None]] = None,
+) -> None:
+    """Combine a number of data files together.
+
+    `data` is a CoverageData.
+
+    Treat `data.filename` as a file prefix, and combine the data from all
+    of the data files starting with that prefix plus a dot.
+
+    If `aliases` is provided, it's a `PathAliases` object that is used to
+    re-map paths to match the local machine's.
+
+    If `data_paths` is provided, it is a list of directories or files to
+    combine.  Directories are searched for files that start with
+    `data.filename` plus dot as a prefix, and those files are combined.
+
+    If `data_paths` is not provided, then the directory portion of
+    `data.filename` is used as the directory to search for data files.
+
+    Unless `keep` is True every data file found and combined is then deleted
+    from disk. If a file cannot be read, a warning will be issued, and the
+    file will not be deleted.
+
+    If `strict` is true, and no files are found to combine, an error is
+    raised.
+
+    `message` is a function to use for printing messages to the user.
+
+    """
+    files_to_combine = combinable_files(data.base_filename(), data_paths)
+
+    if strict and not files_to_combine:
+        raise NoDataError("No data to combine")
+
+    file_hashes = set()
+    combined_any = False
+
+    for f in files_to_combine:
+        if f == data.data_filename():
+            # Sometimes we are combining into a file which is one of the
+            # parallel files.  Skip that file.
+            if data._debug.should("dataio"):
+                data._debug.write(f"Skipping combining ourself: {f!r}")
+            continue
+
+        try:
+            rel_file_name = os.path.relpath(f)
+        except ValueError:
+            # ValueError can be raised under Windows when os.getcwd() returns a
+            # folder from a different drive than the drive of f, in which case
+            # we print the original value of f instead of its relative path
+            rel_file_name = f
+
+        with open(f, "rb") as fobj:
+            hasher = hashlib.new("sha3_256")
+            hasher.update(fobj.read())
+            sha = hasher.digest()
+            combine_this_one = sha not in file_hashes
+
+        delete_this_one = not keep
+        if combine_this_one:
+            if data._debug.should("dataio"):
+                data._debug.write(f"Combining data file {f!r}")
+            file_hashes.add(sha)
+            try:
+                new_data = CoverageData(f, debug=data._debug)
+                new_data.read()
+            except CoverageException as exc:
+                if data._warn:
+                    # The CoverageException has the file name in it, so just
+                    # use the message as the warning.
+                    data._warn(str(exc))
+                if message:
+                    message(f"Couldn't combine data file {rel_file_name}: {exc}")
+                delete_this_one = False
+            else:
+                data.update(new_data, aliases=aliases)
+                combined_any = True
+                if message:
+                    message(f"Combined data file {rel_file_name}")
+        else:
+            if message:
+                message(f"Skipping duplicate data {rel_file_name}")
+
+        if delete_this_one:
+            if data._debug.should("dataio"):
+                data._debug.write(f"Deleting data file {f!r}")
+            file_be_gone(f)
+
+    if strict and not combined_any:
+        raise NoDataError("No usable data files")
+
+
+def debug_data_file(filename: str) -> None:
+    """Implementation of 'coverage debug data'."""
+    data = CoverageData(filename)
+    filename = data.data_filename()
+    print(f"path: {filename}")
+    if not os.path.exists(filename):
+        print("No data collected: file doesn't exist")
+        return
+    data.read()
+    print(f"has_arcs: {data.has_arcs()!r}")
+    summary = line_counts(data, fullpath=True)
+    filenames = human_sorted(summary.keys())
+    nfiles = len(filenames)
+    print(f"{nfiles} file{plural(nfiles)}:")
+    for f in filenames:
+        line = f"{f}: {summary[f]} line{plural(summary[f])}"
+        plugin = data.file_tracer(f)
+        if plugin:
+            line += f" [{plugin}]"
+        print(line)
+
+
+def sorted_lines(data: CoverageData, filename: str) -> List[int]:
+    """Get the sorted lines for a file, for tests."""
+    lines = data.lines(filename)
+    return sorted(lines or [])